Carbonated spring culture
A bathing tradition built around fine CO2 bubbles, warm water, and quiet daily care.
About Nagayu
From Japan's carbonated springs to everyday care.
Nagayu was created to bring the quiet feeling of Japanese carbonated hot spring culture into modern homes: a simple CO2 ritual for the shower and bath you already take.
A town shaped by naturally carbonated spring water.
Nagayu is named after Nagayu Onsen, a hot spring town in Taketa, Oita, Japan. The area is known for naturally carbonated spring water and a bathing culture built around warmth, stillness, and the fine sensation of CO2 bubbles in water.
In Japan, carbonated bathing is valued as a refined wellness ritual: gentle, sensory, and easy to return to. NAGAYU translates that cultural experience into a cleaner, more practical format for daily bath and shower routines.
Japanese wellness sensibility
Less about excess, more about small rituals that make ordinary care feel considered.
Designed for home
A compact tablet ritual that brings the feeling of carbonated spring water closer to everyday life.
Carbonated care in Japan
From hot springs into professional care settings.
Rehabilitation & wellness
Recovery-minded bathing environments
Carbonated water has been explored in Japanese medical rehabilitation and wellness settings as part of bathing and body-care routines.
Beauty & hair salons
Scalp, skin, and finish rituals
Beauty professionals use carbonated water concepts to create a cleaner, softer-feeling finish after cleansing.
Pet grooming
Gentler coat-care routines
Grooming environments have adopted carbonated rinse thinking for skin-and-coat comfort and a more refined post-bath feel.
Founded in 2016
NAGAYU brings the Japanese carbonated spring idea home.
Founded in 2016, NAGAYU was built around one clear idea: make Japan's carbonated spring culture easier to experience beyond the hot spring town, beyond the salon, and beyond professional care spaces.
Our tablets and shower systems are designed for international homes, offering a simple final rinse or bath ritual that feels calm, clean, and beautifully intentional.
Our belief
A better routine does not need to be complicated.
NAGAYU keeps the ritual simple: prepare the tablet, run warm water through it, and let the final carbonated rinse become a small moment of care at the end of the day.